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ENVIRONMENTAL AND NATURAL RESOURCE DAMAGE LIABILITIES (Tables) | 9 Months Ended
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Sep. 30, 2021
Environmental Remediation Obligations [Abstract] |
Schedule of Environmental Loss Contingencies by Site | Changes in environmental and NRD liabilities from December 31, 2020 to September 30, 2021 are shown below:
| Port Gamble, WA
Non-current portion at December 31, 2020 | $10,615
Plus: Current portion | 1,026
Total Balance at December 31, 2020 | 11,641
Expenditures charged to liabilities | (762)
Increase to liabilities | 71
Total Balance at September 30, 2021 | 10,950
Less: Current portion | (1,095)
Non-current portion at September 30, 2021 | $9,855

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